DERMABIT 4170 (3170, 5170) is a high performance roofing and waterproofing membrane nreinforced with a core of non woven polyester of 200g/m2 nominal weight, suitable for a nvariety of applications among them; roofs, terraces, foundations, basements, pile capping, nfooting, tanking, car parks, bridge decks and abutments, tank lining, swimming pools, airport naprons, ramp areas and others.